The socket using high-quality chrome vanadium steel 50 bv30 cold-press forming, torque 50% higher than that of carbon steel, use inferior smooth surface processing, good rust prevention effect. Batch head adopts stronger hardness, toughness is higher. Rapid fall off ratchet wrench (positive and negative adjustable), The push button quick release feature ensures taht the socket is locked securely while in use, but also allows for easy removal or quick change of socket evev with greasy or oily finger.